Re: [TCML] How linear does a ballast need to be

[jhowson4@xxxxxxxxxxx]

alright my not so great understanding of ballast coils just went out the window. 

I had the understanding that as you added an air gap to the core the current being drawn goes down 

and in the case of the ballast type that the core is physically pulled from the coils that as the core is removed the current goes down. 

I am asking because according to his graph my understanding is exactly opposite of reality. 
could some one please explain how these work to me. 

thanks , 
Jay Howson 

----- Original Message ----- 
From: "David Dean" <deano@xxxxxxxxxxxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Wednesday, July 8, 2009 10:03:59 PM GMT -05:00 US/Canada Eastern 
Subject: [TCML] How linear does a ballast need to be 

Hi 

I just improvised a ballast from two MOT primaries in series on a single MOT 
core with adjustable gap A La Richie Burnett. 

Core cross sectional area 3.5 sqin 

Number turns, wire gauge, unknown-- whatever a MOT primary has 

I am looking for 100mA short circuit 14400V open circuit for my application, 
that is about 6A at 240V input. That hits on the dark blue line (0.035" gap) of 
my improvised ballast from the test I just did-- see: 

http://deanostoybox.com/temp/vi.png 

My Question, is this linear enough to use as is, or do I need to go back to the 
drawing board? 

later 
deano 
_______________________________________________ 
Tesla mailing list 
Tesla@xxxxxxxxxxxxxx 
http://www.pupman.com/mailman/listinfo/tesla 
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla